package com.itcast.sevice;

import com.alibaba.dubbo.config.annotation.Reference;
import com.itcast.pojo.Permission;
import com.itcast.pojo.Role;
import com.itcast.pojo.User;
import com.itcast.service.UserService;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.stereotype.Component;

import java.util.ArrayList;
import java.util.List;
import java.util.Set;

@Component

public class SpringSecurityUserService implements UserDetailsService {
    @Reference //注意：此处要通过dubbo远程调用用户服务
    private UserService userService;
  
    //根据用户名查询用户信息
    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        //远程调用用户服务，根据用户名查询用户信息
        User user = userService.findByUsername(username);
        if(user == null){
              //用户名不存在
              return null;
        }

        List<GrantedAuthority> list = new ArrayList<>();
        // 动态为当前用户授权
        Set<Role> roles = user.getRoles();
        for(Role role : roles){
            //授予角色
            list.add(new SimpleGrantedAuthority(role.getKeyword()));
            Set<Permission> permissions = role.getPermissions();
            for(Permission permission : permissions){
                //授权
                list.add(new SimpleGrantedAuthority(permission.getKeyword()));
            }
        }
        
//        UserDetails userDetails = new User(username,user.getPassword(),list);
        UserDetails userDetails=new org.springframework.security.core.userdetails.User(username,user.getPassword(),list);
        return userDetails;
    }
}